Dell Latitude 7640 Operation and maintenance manual

Latitude 7640
Setup and Specifications
Regulatory Model: P126F
Regulatory Type: P126F001
March 2023
Rev. A00

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid
the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
© 2023 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its
subsidiaries. Other trademarks may be trademarks of their respective owners.

Chapter 1: Set up your Latitude 7640............................................................................................ 4
Chapter 2: Views of Latitude 7640.................................................................................................6
Right....................................................................................................................................................................................... 6
Left..........................................................................................................................................................................................6
Top.......................................................................................................................................................................................... 7
Display.................................................................................................................................................................................... 8
Bottom................................................................................................................................................................................... 9
Service Tag........................................................................................................................................................................... 9
Modes................................................................................................................................................................................... 10
Battery charge and status light ......................................................................................................................................11
Chapter 3: Specifications of Latitude 7640.................................................................................. 12
Dimensions and weight..................................................................................................................................................... 12
Processor............................................................................................................................................................................. 12
Chipset..................................................................................................................................................................................13
Operating system...............................................................................................................................................................13
Memory.................................................................................................................................................................................13
External ports......................................................................................................................................................................14
Internal slots........................................................................................................................................................................14
Wireless module..................................................................................................................................................................14
Audio..................................................................................................................................................................................... 15
Storage................................................................................................................................................................................. 15
Keyboard.............................................................................................................................................................................. 16
Camera................................................................................................................................................................................. 16
Clickpad................................................................................................................................................................................ 17
Power adapter.....................................................................................................................................................................17
Battery..................................................................................................................................................................................18
Display..................................................................................................................................................................................20
Fingerprint reader (Optional)......................................................................................................................................... 20
Sensor ..................................................................................................................................................................................21
GPU—Integrated............................................................................................................................................................... 21
Multiple display support matrix.......................................................................................................................................21
Hardware security............................................................................................................................................................. 22
Smart-card reader.............................................................................................................................................................22
Contactless smart-card reader................................................................................................................................ 22
Contacted smart-card reader...................................................................................................................................24
Operating and storage environment.............................................................................................................................24
Chapter 4: ComfortView Plus...................................................................................................... 26
Chapter 5: Keyboard shortcuts of Latitude 7640......................................................................... 27
Chapter 6: Getting help and contacting Dell................................................................................ 29
Contents
Contents 3

Set up your Latitude 7640
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
1. Connect the power adapter and press the power button.
NOTE: To conserve battery power, the battery might enter power saving mode. Connect the power adapter and press
the power button to turn on the computer.
2. Finish operating system setup.
For Ubuntu:
Follow the on-screen instructions to complete the setup. For more information about installing and configuring Ubuntu,
search in the Knowledge Base Resource at www.dell.com/support.
For Windows:
Follow the on-screen instructions to complete the setup. When setting up, Dell recommends that you:
●Connect to a network for Windows updates.
NOTE: If connecting to a secured wireless network, enter the password for the wireless network access when
prompted.
●If connected to the internet, sign-in with or create a Microsoft account. If not connected to the internet, create an
offline account.
1
4 Set up your Latitude 7640

●On the Support and Protection screen, enter your contact details.
3. Locate and use Dell apps from the Windows Start menu—Recommended.
Table 1. Locate Dell apps
Resources Description
Dell Product Registration
Register your computer with Dell.
Dell Help & Support
Access help and support for your computer.
SupportAssist
SupportAssist is the smart technology that keeps your computer running at its best by optimizing
settings, detecting issues, removing viruses and notifies when you need to make system
updates. SupportAssist proactively checks the health of your system's hardware and software.
When an issue is detected, the necessary system state information is sent to Dell to begin
troubleshooting. SupportAssist is preinstalled on most of the Dell devices running Windows
operating system. For more information, see SupportAssist for Home PCs User's Guide on
www.dell.com/serviceabilitytools.
NOTE: In SupportAssist, click the warranty expiry date to renew or upgrade your warranty.
Dell Update
Updates your computer with critical fixes and latest device drivers as they become available. For
more information on using Dell Update, search in the Knowledge Base Resource at www.dell.com/
support.
Dell Digital Delivery
Download software applications, which are purchased but not preinstalled on your computer.
For more information on using Dell Digital Delivery, search in the Knowledge Base Resource at
www.dell.com/support.
Set up your Latitude 7640 5

Views of Latitude 7640
Right
1. NanoSIM slot (optional)
2. Universal audio port
3. USB 3.2 Gen 1 port
4. USB 3.2 Gen 1 port with PowerShare
5. Wedge-shaped lock slot
Left
1. HDMI 2.0 port
2. Thunderbolt 4 ports with DisplayPort Alt Mode/USB4/Power Delivery
3. Thunderbolt 4 ports with DisplayPort Alt Mode/USB4/Power Delivery
4. Battery indicator LED
5. Smart-card reader slot (optional)
2
6 Views of Latitude 7640

Top
1. Dual array microphone
2. Camera shutter
3. Power button with fingerprint reader (optional)
4. Keyboard
5. Speaker
6. Clickpad
7. Speaker
Views of Latitude 7640 7

Display
1. IR emitter (optional)
2. IR camera (optional)
3. RGB camera
4. Camera indicator LED
5. Ambient Light Sensor (ALS, optional)
6. LCD panel
8Views of Latitude 7640

Bottom
1. Speakers
2. Air vents
3. Service Tag
Service Tag
The service tag is a unique alphanumeric identifier that allows Dell service technicians to identify the hardware components in
your computer and access warranty information.
Views of Latitude 7640 9

Modes
NOTE: The following modes are applicable only to Latitude 7640 2-in-1 computers.
Notebook
Tablet
Stand
Tent
10 Views of Latitude 7640

Battery charge and status light
The following table lists the battery charge and status light behavior of your Latitude 7640.
Table 2. Battery charge and status light behavior
Power Source LED Behavior System Power State Battery Charge Level
AC Adapter Off S0 - S5 Fully Charged
AC Adapter Solid White S0 - S5 < Fully Charged
Battery Off S0 - S5 11-100%
Battery Solid Amber (590+/-3 nm) S0 - S5 < 10%
●S0 (ON) - System is turned on.
●S4 (Hibernate) - The system consumes the least power compared to all other sleep states. The system is almost at an OFF
state, expect for a trickle power. The context data is written to hard drive.
●S5 (OFF) - The system is in a shutdown state.
Views of Latitude 7640 11

Specifications of Latitude 7640
Dimensions and weight
The following table lists the height, width, depth, and weight of your Latitude 7640.
Table 3. Dimensions and weight
Description Values
Height:
Front height 18.4 mm (0.72 in.)
Rear height 19.5 mm (0.77 in.)
Width 358 mm (14.09 in.)
Depth 250.42 mm (9.85 in.)
Weight
NOTE: The weight of your computer depends on the
configuration ordered and manufacturing variability.
4.05 lbs. (1.837 kg)
Processor
The following table lists the details of the processors that are supported by your Latitude 7640.
Table 4. Processor
Description Option one Option two Option three Option four Option five Option six Option
seven
Processor
type
13th
Generation
Intel Core
i5-1335U
13th
Generation
Intel Core
i5-1345U
13th
Generation
Intel Core
i7-1355U
13th
Generation
Intel Core
i7-1365U
13th
Generation
Intel Core
i5-1340P
13th
Generation
Intel Core
i5-1350P
13th
Generation
Intel Core
i7-1370P
Processor
wattage
15 W 15 W 15 W 15 W 28 W 28 W 28 W
Processor
core count
10 10 10 10 12 12 14
Processor
thread count
12 12 12 12 16 16 14
Processor
speed
0.9 GHz to
4.6 GHz
1.2 GHz to 4.7
GHz
1.2 GHz to 5.0
GHz
1.3 GHz to 5.2
GHz
1.4 GHz to 4.6
GHz
1.4 GHz to 4.7
GHz
1.4 GHz to 5.2
GHz
Processor
cache
12 MB 12 MB 12 MB 12 MB 12 MB 12 MB 24 MB
Integrated
graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
3
12 Specifications of Latitude 7640

Chipset
The following table lists the details of the chipset supported by your Latitude 7640.
Table 5. Chipset
Description Values
Chipset Integrated in the processor
Processor 13th Generation Intel Core i5/i7
DRAM bus width Dual-channel, 64-bit
Flash EPROM 32 MB + 16 MB
PCIe bus Up to Gen4.0
Operating system
Your Latitude 7640 supports the following operating systems:
●Windows 11 2022H2
●Windows 11 2021H2
●Windows 11 Pro Downgrade (Windows 10 image factory installed)
●Ubuntu 22.04, 64-bit
Memory
The following table lists the memory specifications of your Latitude 7640.
Table 6. Memory specifications
Description Values
Memory slots On-board memory
NOTE: Not ungradable
Memory type Dual-channel, LPDDR5
Memory speed 4800 MT/s
Maximum memory configuration 32 GB
Minimum memory configuration 8 GB
Memory configurations supported ●8 GB, Dual-Channel LPDDR5, 4800 MT/s
●16 GB, Dual-Channel LPDDR5, 4800 MT/s
●32 GB, Dual-Channel LPDDR5, 4800 MT/s
Specifications of Latitude 7640 13

External ports
The following table lists the external ports on your Latitude 7640.
Table 7. External ports
Description Values
USB ports ●Two Thunderbolt 4 ports with DisplayPort Alt Mode/USB
C/USB4/Power Delivery
●One USB 3.2 Gen 1 port
●One USB 3.2 Gen 1 port with PowerShare
Audio port One Universal Audio Jack
Video port/ports One HDMI 2.0
Media-card reader Not supported
Power-adapter port 60 W/65 W/100 W adapter USB-C
Security-cable slot One wedge-shaped security lock slot
Smart Card Reader Contacted and Contactless + NFC (optional)
SIM slot NanoSIM slot (optional)
Internal slots
The following table lists the internal slots of your Latitude 7640.
Table 8. Internal slots
Description Values
M.2 ●One M.2 2230 slot for solid-state drive
●One M.2 3042 slot for 4G WWAN card
●One M.2 3052 slot for 5G WWAN card
NOTE: To learn more about the features of different
types of M.2 cards, search in the Knowledge Base
Resource at www.dell.com/support.
Wireless module
The following table lists the Wireless Local Area Network (WLAN) module supported on your Latitude 7640.
Table 9. Wireless module specifications
Description Values
Model number Intel AX211 (Integrated on system board)
Transfer rate 2400 Mbps
Frequency bands supported 2.40 GHz/5 GHz/6 GHz
Wireless standards ●WiFi 802.11a/b/g
●Wi-Fi 4 (WiFi 802.11n)
14 Specifications of Latitude 7640

Table 9. Wireless module specifications (continued)
Description Values
●Wi-Fi 5 (WiFi 802.11ac)
●Wi-Fi 6E (WiFi 802.11ax)
Encryption ●64-bit/128-bit WEP
●AES-CCMP
●TKIP
Bluetooth Bluetooth wireless card
Audio
The following table lists the audio specifications of your Latitude 7640.
Table 10. Audio specifications
Description Values
Audio controller Realtek ALC3281
Stereo conversion Supported
Internal audio interface High definition audio interface
External audio interface Universal Audio Jack
Number of speakers Four
Internal-speaker amplifier Supported
External volume controls Supported
Speaker output:
Average speaker output 2 W
Peak speaker output 2.5 W
Subwoofer output Not supported
Microphone Dual-array
Storage
This section lists the storage options on your Latitude 7640.
Your computer supports the following storage configurations:
●One M.2 2230 solid-state drive
The M.2 2230 solid-state drive is the primary drive of your computer.
Table 11. Storage specifications
Storage type Interface type Capacity
M.2 2230 solid-state drive PCIe NVMe Gen4 x4 256 GB/512 GB/1 TB/2 TB
Specifications of Latitude 7640 15

Table 11. Storage specifications (continued)
Storage type Interface type Capacity
M.2 2230 solid-state drive, Self-
encrypting drive, Opal 2.0
PCIe NVMe Gen4 x4 Up to 256 GB
Keyboard
The following table lists the keyboard specifications of your Latitude 7640.
Table 12. Keyboard specifications
Description Values
Keyboard type New Pro 2.5 battery-saving Mini LED backlit keyboard
Keyboard layout QWERTY
Number of keys ●United States and Canada: 79 keys
●United Kingdom: 80 keys
●Japan: 83 keys
Keyboard size X=19.05 mm key pitch
Y=18.05 mm key pitch
Keyboard shortcuts Some keys on your keyboard have two symbols on them.
These keys can be used to type alternate characters or to
perform secondary functions. To type the alternate character,
press Shift and the desired key. To perform secondary
functions, press Fn and the desired key.
NOTE: You can define the primary behavior of the
function keys (F1–F12) changing Function Key Behavior
in BIOS setup program.
Camera
The following table lists the camera specifications of your Latitude 7640.
Table 13. Front camera specifications
Description Values
Number of cameras One
Camera type FHD RGB+IR MIPI camera/CVF Camera
Camera location Front camera
Camera sensor type CMOS sensor technology
Camera resolution:
Still image 1920 x 1080 (FHD)
Video 1920 x 1080 (FHD) at 30 fps
Infrared camera resolution:
Still image 640 x 360
Video 640 x 360 at 30 fps
16 Specifications of Latitude 7640

Table 13. Front camera specifications (continued)
Description Values
Diagonal viewing angle:
Camera 80 degrees
Infrared camera 86.6 degrees
Table 13. Front camera specifications
Description Values
Number of cameras One
Camera type 3.8 mm, 1080 p at 30 fps, FHD RGB Webcam
Camera location Front camera
Camera sensor type CMOS sensor technology
Camera resolution:
Still image 1920 x 1080 (FHD)
Video 1920 x 1080 (FHD) at 30 fps
Diagonal viewing angle:
Camera 82 degrees
Clickpad
The following table lists the clickpad specifications of your Latitude 7640.
Table 14. Clickpad specifications
Description Values
Clickpad resolution:
Horizontal >300 dpi
Vertical
Clickpad dimensions:
Horizontal 133 mm (5.23 in.)
Vertical 90 mm (3.54 in.)
Clickpad gestures For more information about clickpad gestures available on
Windows, see the Microsoft knowledge base article at
support.microsoft.com.
Power adapter
The following table lists the power adapter specifications of your Latitude 7640.
Table 15. Power adapter specifications
Description Option one Option two Option three
Type 60 W AC adapter, USB-C 65 W AC adapter, USB-C 100 W AC adapter, USB-C
Power-adapter dimensions:
Specifications of Latitude 7640 17

Table 15. Power adapter specifications (continued)
Description Option one Option two Option three
Height 22.00 mm (0.866 in.) 28.00 mm (1.10 in.) 26.50 mm (4.80 in.)
Width 66.00 mm (2.598 in.) 51.00 mm (2.01 in.) 60.00 mm (2.36 in.)
Depth 55.00 mm (2.165 in.) 112.00 mm (4.41 in.) 122.00 mm (4.80 in.)
Weight 0.105 kg (0.231 lbs) 0.201 kg (0.443 lbs) 0.33 kg (0.731 lbs)
Input voltage 100 VAC – 240 VAC 100 VAC – 240 VAC 100 VAC – 240 VAC
Input frequency 50 Hz – 60 Hz 50 Hz – 60 Hz 50 Hz – 60 Hz
Input current (maximum) 1.70 A 1.70 A 1.70 A
Output current (continuous) ●20 V/3 A
●15 V/3 A
●9 V/3 A
●5 V/3 A
●20 V/3.25 A
●15 V/3 A
●9 V/3 A
●5 V/3 A
●20 V/5 A
●15 V/3 A
●9 V/3 A
●5 V/3 A
Rated output voltage ●20 VDC
●15VDC
●9 VDC
●5 VDC
●20 VDC
●15VDC
●9 VDC
●5 VDC
●20 VDC
●15VDC
●9 VDC
●5 VDC
Temperature range:
Operating 0°C to 40°C (32°F to 104°F) 0°C to 40°C (32°F to
104°F)
0°C to 40°C (32°F to 104°F)
Storage -20°C to 70°C (-4°F to
158°F)
-40°C to 70°C (-40°F to
158°F)
-40°C to 70°C (-40°F to
158°F)
CAUTION: Operating and storage temperature ranges may differ among components, so operating or storing
the device outside these ranges may impact the performance of specific components.
Battery
The following table lists the battery specifications of your Latitude 7640.
Table 16. Battery specifications
Description Option one Option two Option three Option four
Battery type 2-cell, 38 Wh, lithium
ion, ExpressCharge™
3-cell, 57 Wh, lithium ion,
ExpressCharge™
2-cell, 38 Wh, lithium
ion, Long Lifecycle,
ExpressCharge™
3-cell, 57 Wh, lithium
ion, Long Lifecycle,
ExpressCharge™
Battery voltage 7.60 VDC 11.40 VDC 7.60 VDC 11.40 VDC
Battery weight
(maximum) 0.156 Kg (0.34 lb) 0.227 kg (0.50 lb) 0.156 Kg (0.34 lb) 0.227 kg (0.50 lb)
Battery dimensions:
Height 6.30 mm (0.24 in.) 6.30 mm (0.24 in.) 6.30 mm (0.24 in.) 6.30 mm (0.24 in.)
Width 210.97 mm (8.30 in.) 254.8 mm (10.03 in.) 210.97 mm (8.30 in.) 254.8 mm (10.03 in.)
Depth 79.80 mm (3.10 in.) 79.8 mm (3.10 in.) 79.80 mm (3.10 in.) 79.8 mm (3.10 in.)
Temperature range:
18 Specifications of Latitude 7640

Table 16. Battery specifications (continued)
Description Option one Option two Option three Option four
Operatin
g
●Charge: 0°C to
45°C (32°F to
113°F)
●Discharge: 0°C to
70°C (32°F to
158°F)
●Charge: 0°C to 45°C
(32°F to 113°F)
●Discharge: 0°C to
70°C (32°F to 158°F)
●Charge: 0°C to
45°C (32°F to
113°F)
●Discharge: 0°C
to 70°C (32°F to
158°F)
●Charge: 0°C to
45°C (32°F to
113°F)
●Discharge: 0°C
to 70°C (32°F to
158°F)
Storage -20°C to 65°C (-4°F
to 149°F)
-20°C to 65°C (-4°F to
149°F)
-20°C to 65°C (4°F
to 149°F)
-20°C to 65°C (4°F
to 149°F)
Battery operating time Varies depending on
operating conditions
and can significantly
reduce under
certain power-intensive
conditions.
Varies depending on
operating conditions and
can significantly reduce
under certain power-
intensive conditions.
Varies depending
on operating
conditions and can
significantly reduce
under certain power-
intensive conditions.
Varies depending
on operating
conditions and can
significantly reduce
under certain power-
intensive conditions.
Battery charging time
(approximate)
NOTE: Control
the charging time,
duration, start and
end time, and so on
using the Dell Power
Manager application.
For more information
about Dell Power
Manager, search
in the Knowledge
Base Resource
at www.dell.com/
support.
Express Charge
Method:
●0 - 15°C maximum
allowable charge
time from 0 to 100%
RSOC is 4 hours
●16 - 45°C normal
express charge
●46 - 50°C maximum
allowable charge
time from 0 to 100%
RSOC is 3 hours
Standard Charge/
Predominately AC
User Charge Method:
●0 - 15°C maximum
allowable charge
time from 0 to 100%
RSOC is 4 hours
●16 - 50°C maximum
allowable charge
time from 0 to 100%
RSOC is 3 hours
Express Charge Boost
Charge Method (Fast
Charge for Initial
35%):
●16 - 45°C target
charge time from 0
to 35% RSOC is 20
mins for Accelerated
Charge
Express Charge
Method:
●0 - 15°C maximum
allowable charge time
from 0 to 100% RSOC
is 4 hours
●16 - 45°C normal
express charge
●46 - 50°C maximum
allowable charge time
from 0 to 100% RSOC
is 3 hours
Standard Charge/
Predominately AC User
Charge Method:
●0 - 15°C maximum
allowable charge time
from 0 to 100% RSOC
is 4 hours
●16 - 50°C maximum
allowable charge time
from 0 to 100% RSOC
is 3 hours
Express Charge Boost
Charge Method (Fast
Charge for Initial 35%):
●16 - 45°C target
charge time from 0 to
35% RSOC is 20 mins
for Accelerated Charge
Express Charge
Method:
●0 -
15°C maximum
allowable charge
time from 0 to
100% RSOC is 4
hours
●16 - 45°C normal
express charge
●46 -
50°C maximum
allowable charge
time from 0 to
100% RSOC is 3
hours
Standard Charge/
Predominately AC
User Charge
Method:
●0 -
15°C maximum
allowable charge
time from 0 to
100% RSOC is 4
hours
●16 -
50°C maximum
allowable charge
time from 0 to
100% RSOC is 3
hours
Express Charge
Method:
●0 -
15°C maximum
allowable charge
time from 0 to
100% RSOC is 4
hours
●16 - 45°C normal
express charge
●46 -
50°C maximum
allowable charge
time from 0 to
100% RSOC is 3
hours
Standard Charge/
Predominately AC
User Charge
Method:
●0 -
15°C maximum
allowable charge
time from 0 to
100% RSOC is 4
hours
●16 -
50°C maximum
allowable charge
time from 0 to
100% RSOC is 3
hours
Coin-cell battery Supported Supported Supported Supported
CAUTION: Operating and storage temperature ranges may differ among components, so operating or storing
the device outside these ranges may impact the performance of specific components.
CAUTION: Dell recommends that you charge the battery regularly for optimal power consumption. If your
battery charge is completely depleted, connect the power adapter, turn on your computer, and then restart
your computer to reduce the power consumption.
Specifications of Latitude 7640 19

Display
The following table lists the display specifications of your Latitude 7640.
Table 17. Display specifications
Description Option one Option two
Display type Full High Definition Plus (FHD+) Full High Definition Plus (FHD+)
Touch options No Integrated touch
Display-panel technology In-Plane Switching (IPS) In-Plane Switching (IPS)
Display-panel dimensions (active area):
Height 344.68 mm (13.57 in.) 344.68 mm (13.57 in.)
Width 215.42 mm (8.48 in.) 215.42 mm (8.48 in.)
Diagonal 406.46 mm (16.00 in.) 406.46 mm (16.00 in.)
Display-panel native resolution 1920 x 1200 1920 x 1200
Luminance (typical) 250 nits 300 nits
Megapixels 2.30 2.30
Color gamut 45% NTSC 72% NTSC
Pixels Per Inch (PPI) 141.5 ppi 141.5 ppi
Contrast ratio (min.) 800:1 600:01
Response time (max.) 35 ms 35 ms
Refresh rate 60 Hz 60 Hz
Horizontal view angle ●85 degrees (typical)
●80 degrees (min)
●85 degrees (typical)
●80 degrees (min)
Vertical view angle ●85 degrees (typical)
●80 degrees (min)
●85 degrees (typical)
●80 degrees (min)
Pixel pitch 0.17952 mm x 0.17952 mm 0.17952 mm x 0.17952 mm
Power consumption (maximum) 4.15 W 4.2 W
Anti-glare vs glossy finish Anti-glare Anti-glare
Fingerprint reader (Optional)
The following table lists the fingerprint-reader specifications of your Latitude 7640.
NOTE: The fingerprint reader is located on the power button.
20 Specifications of Latitude 7640